I recently bought a Crucial MX200... I was contemplating the BX100 120GB SSD, but I felt that I could do more with 250GB with the MX200... and when I bought it I looked at the reviews, and everyone seemed impressed by it.
So I personally went for the Crucial, though not much difference in price from the MX200 and the 850 EVO, I strangely preferred the look of the Crucial and it had great reviews.
